/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  The ASF licenses this file to You
 * under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.  For additional information regarding
 * copyright in this work, please see the NOTICE file in the top level
 * directory of this distribution.
 */
package org.apache.roller.weblogger.ui.rendering.mobile;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

public class MobileDeviceRepository {

	public enum DeviceType { standard, mobile };

	public static final String possibleDevices1 = ".*(android|avantgo|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)"
			+ "|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\\\/|"
			+ "plucker|pocket|psp|symbian|treo|up\\\\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino).*";
	public static final String possibleDevices2 =
			"\"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\\\\-)|"
			+ "ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\\\\-m|r |s )|"
			+ "avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\\\\-(n|u)|c55\\\\/|capi|ccwa|cdm\\\\-|"
			+ "cell|chtm|cldc|cmd\\\\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\\\\-s|devi|dica|dmob|do(c|p)o|ds(12|\\\\-d)|"
			+ "el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\\\\-|_)|g1 u|g560|gene|gf\\\\-5|g\\\\-mo|"
			+ "go(\\\\.w|od)|gr(ad|un)|haie|hcit|hd\\\\-(m|p|t)|hei\\\\-|hi(pt|ta)|hp( i|ip)|hs\\\\-c|"
			+ "ht(c(\\\\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\\\\-(20|go|ma)|i230|iac( |\\\\-|\\\\/)|ibro|idea|ig01|ikom|im1k|"
			+ "inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\\\\/)|klon|kpt |kwc\\\\-|kyo(c|k)|le(no|xi)|"
			+ "lg( g|\\\\/(k|l|u)|50|54|e\\\\-|e\\\\/|\\\\-[a-w])|libw|lynx|m1\\\\-w|m3ga|m50\\\\/|"
			+ "ma(te|ui|xo)|mc(01|21|ca)|m\\\\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\\\\-| |o|v)|zz)|"
			+ "mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\\\\-|on|tf|wf|wg|wt)|"
			+ "nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\\\\-([1-8]|c))|phil|pire|pl(ay|uc)|"
			+ "pn\\\\-2|po(ck|rt|se)|prox|psio|pt\\\\-g|qa\\\\-a|qc(07|12|21|32|60|\\\\-[2-7]|i\\\\-)|qtek|r380|r600|raks|"
			+ "rim9|ro(ve|zo)|s55\\\\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\\\\-|oo|p\\\\-)|sdk\\\\/|"
			+ "se(c(\\\\-|0|1)|47|mc|nd|ri)|sgh\\\\-|shar|sie(\\\\-|m)|sk\\\\-0|sl(45|id)|"
			+ "sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\\\\-|v\\\\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|"
			+ "ta(gt|lk)|tcl\\\\-|tdg\\\\-|tel(i|m)|tim\\\\-|t\\\\-mo|to(pl|sh)|ts(70|m\\\\-|m3|m5)|tx\\\\-9|"
			+ "up(\\\\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\\\\-v)|vm40|voda|vulc|"
			+ "vx(52|53|60|61|70|80|81|83|85|98)|w3c(\\\\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|xda(\\\\-|2|g)|"
			+ "yas\\\\-|your|zeto|zte\\\\-";
	public static final String USER_REQUEST_TYPE = "roller_user_request_type";
	public static final String USER_AGENT_PARAMETER = "deviceType";

	/**
	 *
	 * ToCheck if a request is mobile.
	 * @param request
	 * @return   boolean
	 */
	public static boolean isMobileDevice(HttpServletRequest request) {

		String userAgent = request.getHeader("User-Agent").toLowerCase();
		return (userAgent.matches(possibleDevices1) || userAgent.substring(0, 4).matches(possibleDevices2));

	}

	public static DeviceType getRequestType(HttpServletRequest request) {
		DeviceType type = DeviceType.standard;
		
		String deviceTypeParam = request.getParameter(USER_AGENT_PARAMETER);
		if (deviceTypeParam !=null){
			return deviceTypeParam.trim().equals("standard") ? DeviceType.standard : DeviceType.mobile;
		}
		
		String cookie = getCookieValue(request.getCookies(), USER_REQUEST_TYPE, null);
		if (cookie != null) {
			return cookie.equals("standard") ? DeviceType.standard : DeviceType.mobile;
		}
		
		if (isMobileDevice(request)) {
			type = DeviceType.mobile; 
		}
		return type;
	}

	private static String getCookieValue(Cookie[] cookies,
			String cookieName,
			String defaultValue) {
		if (cookies != null) for (int i = 0; i < cookies.length; i++) {
			Cookie cookie = cookies[i];
			if (cookieName.equals(cookie.getName())) {
				return (cookie.getValue());
			}
		}
		return (defaultValue);
	}
}
